Eugene o neill



(N0 Mode l.)

E. ONEILL.

Hoisting Machine Brake.

No. 240,329. Patented April 19,1881.

N. FETERS, PNOTOJJTNDGRAPHER, WASHINGTD fifi v UNITED STATES PATENT OF IGE.

EUGENE ONEILL, OF SAN FRANCISCO, CALIFORNIA.

HOISTlNG-MACHiNE BRAKE.

SPECIFICATION forming part of Letters Patent No. 240,329, dated April 19, 1881 Application filed February 26, 1881. (No model.)

To all whom it may concern Be it known that I, EUGENE ONEILL, of the city and county of San Francisco, State of California, have invented an Improved Hoisting- Machine Brake; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in brakes which are-used for hoisting machinery, being especially applicable for use upon the heavy machinery employed in mines.

It consists in a novel means for suspending the brake blocks and shoes upon opposite sides of the wheel or pulley upon which they act, so that while swinging about their center of suspension they act in radial lines toward the center of the wheel.

It further consists in an adjustment by which the movement of the two opposing brakes, operated from opposite sides of the wheel by a single mechanism, may be regulated in their movements to and from the wheel, as will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a side elevation of a brake-wheel and my improved brakes. Fig. 2 is an end or transverse view. Fig. 3 is the other end view.

- A'is a brake-wheel. B are the brake-shoes,

which are secured within the brake-block C. These brake-blocks have boxes D at the rear, midway between the ends, through which the pins E pass horizontally, and have their ends supported in the upper ends of the links F, so that the brake-blocks may turn upon the pins and adjust themselves and the shoes to the face of the wheel when pressure is brought upon them. The lower ends of the links are supported on fulcrums at G, about which they move when the brakes are moved to or from the wheel. The brakes are supported so that their centers are below the center of the wheel, and the links F incline outward from the wheel, so that when released the brakes will fall away from the wheel by gravitation.

The brakes are operated by aT-headed lever, H, this lever being connected with an operating-lever, I, by a link, J, or it may be actuated in any other suitable manner. One of the arms of the T-head is connected with the center-pin E, at the rear of the brake block,

upon the same side with the lever, and the other is connected with the pin of the opposite brake-block by connecting or side rods, K, as shown.

It will be seen that when the long arm of the lever H is moved upward one of the transverse arms will force its brake-block against the wheel from that side, and the other one will, through the side rods, draw the opposite block against the wheel from the other side. The blocks move about the pivots of their supporting-links in radial lines toward the center of the wheel, and by reason of being journaled upon the pins E at their center they will press evenly against the rim of the Wheel. The weight of the brake blocks and the inclined position of their supporting-links F will cause the blocks to fall away from the wheel as soon as the pressure upon the lever H is relieved. To regulate their movement and make them fall back evenly and to an equal distance I employ adjusting-screws L, which pass through nuts supported upon the stationary floor M, above the center ofsupport of the brake-blocks, and other screws, N, which pass through a cross-bar which extends between the links F, as shown. Suitable plates or buffers upon the backs of the brake-blocks strike against these screws, and the movement of the brakes is thus limited, and the upper and lower portions move back equally.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The brakes .0 B, centrally supported by the angularly-placed links F, and the pins or journals E, upon which they turn loosely, so as to give an equal pressure of all parts of the brake-block upon the wheel, substantially as described.

2. The brake-blocks having their centers supported upon the links F by pins or journals, as shown, in combination with a double-acting lever, H, and connecting-rods K, whereby the brakes are caused to approach to or recede from the wheel in lines radial to its center, as herein described.

3. The brakes suspended upon the links F by the journals or pins E, and operated by the double-acting lever H and side rods, K, in com- In Witness whereof I have hereunto set my hand.

EUGENE ONEILL.

Witnesses FRANK A. BROOKS, S. H. NOURsE. 

